Only rear jerry, the front requires replacement arms (£300+) but are not needed. The front doesnt go wildly out of spec when lowered like the rear does.
You do however NEED some sort of rear TOE/Camber adjustment, it goes miles out.
Also people seem way to worried about camber, you can run 3deg no worries, its the toe going out of spec that will wear out your tyres and make the car handle like a dog.
If you fit springs, you have to factor in 4 wheel alignment + possibly Toe/Camber adjusters at the rear
The OEM setup does have some adjustment for toe/camber, it just might not be enough.